21538456

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{158371}}^1$

素因数の和:158394

約数の個数: 16

約数和(自身を含む): 42760440

約数和(自身を除く): 21221984

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 158371, 316742, 633484, 1266968, 2692307, 5384614, 10769228, 21538456]

約数ペア:

[(1, 21538456), (2, 10769228), (4, 5384614), (8, 2692307), (17, 1266968), (34, 633484), (68, 316742), (136, 158371)]